in a radioactive decay an emitted electron comes from

In a radioactive decay, an emitted electron comes from

A. the nucleus of atom

B. the orbit with principal quantum number 1

C. the inner orbital of the atom

D. the outermost orbit of the atom

Answer : the nucleus of atom

Solution :
When a radioactive element emits an electron, then one neutron in the nucleus change into proton, so atomic number increase by one unit.
$$_{91}P{a^{234}}{ \to _{92}}{U^{234}}{ + _{ - 1}}{e^0}$$
In nucleus the following reaction takes place
$$_0{n^1} \to {\,_1}{H^1} + {\,_{ - 1}}{e^0}$$

Releted MCQ Question on
Physical Chemistry >> Nuclear Chemistry

Releted Question 1

A nuclide of an alkaline earth metal undergoes radioactive decay by emission of three $$\alpha $$ - particles in succession. The group of the periodic table to which the resulting daughter element would belong is

A. group 14

B. group 16

C. group 4

D. group 6

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Releted Question 2

The radioactive isotope $$_{27}C{o^{60}}$$ which is used in the treatment of cancer can be made by $$(n, p)$$ reaction. For this reaction the target nucleus is

A. $$_{28}N{i^{59}}$$

B. $$_{27}C{o^{59}}$$

C. $$_{28}N{i^{60}}$$

D. $$_{27}C{o^{60}}$$

View Answer

Releted Question 3

The radio isotope, tritium $$\left( {_1{H^3}} \right)$$ has a half-life of $$12.3$$ $$yr.$$ If the initial amount of tritium is $$32$$ $$mg,$$ how many milligrams of it would remain after $$49.2$$ $$yr?$$

A. 4$$\,mg$$

B. 8$$\,mg$$

C. 1$$\,mg$$

D. 2$$\,mg$$

View Answer

Releted Question 4

$$_{92}{U^{235}}$$ nucleus absorb a neutron and disintegrate in $$_{54}X{e^{139}},{\,_{38}}S{r^{94}}$$ and $$X,$$ so what will be the product $$X ?$$

A. 3-neutrons

B. 2-neutrons

C. $$\alpha $$ -particle

D. $$\beta $$ -particle

View Answer

In a radioactive decay, an emitted electron comes from

Releted MCQ Question on
Physical Chemistry >> Nuclear Chemistry

A nuclide of an alkaline earth metal undergoes radioactive decay by emission of three $$\alpha $$ - particles in succession. The group of the periodic table to which the resulting daughter element would belong is

The radioactive isotope $$_{27}C{o^{60}}$$ which is used in the treatment of cancer can be made by $$(n, p)$$ reaction. For this reaction the target nucleus is

The radio isotope, tritium $$\left( {_1{H^3}} \right)$$ has a half-life of $$12.3$$ $$yr.$$ If the initial amount of tritium is $$32$$ $$mg,$$ how many milligrams of it would remain after $$49.2$$ $$yr?$$

$$_{92}{U^{235}}$$ nucleus absorb a neutron and disintegrate in $$_{54}X{e^{139}},{\,_{38}}S{r^{94}}$$ and $$X,$$ so what will be the product $$X ?$$

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Nuclear Chemistry

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In a radioactive decay, an emitted electron comes from

Releted MCQ Question on Physical Chemistry >> Nuclear Chemistry

A nuclide of an alkaline earth metal undergoes radioactive decay by emission of three $$\alpha $$ - particles in succession. The group of the periodic table to which the resulting daughter element would belong is

The radioactive isotope $$_{27}C{o^{60}}$$ which is used in the treatment of cancer can be made by $$(n, p)$$ reaction. For this reaction the target nucleus is

The radio isotope, tritium $$\left( {_1{H^3}} \right)$$ has a half-life of $$12.3$$ $$yr.$$ If the initial amount of tritium is $$32$$ $$mg,$$ how many milligrams of it would remain after $$49.2$$ $$yr?$$

$$_{92}{U^{235}}$$ nucleus absorb a neutron and disintegrate in $$_{54}X{e^{139}},{\,_{38}}S{r^{94}}$$ and $$X,$$ so what will be the product $$X ?$$

Practice More Releted MCQ Question on Nuclear Chemistry

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Releted MCQ Question on
Physical Chemistry >> Nuclear Chemistry

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Nuclear Chemistry